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1. 发明授权

US07822100B2 Phase mapping for QPSK/QBL-MSK waveform 有权
标题翻译： QPSK / QBL-MSK波形的相位映射
公开(公告)号：US07822100B2
公开(公告)日：2010-10-26
申请号：US11314762
申请日：2005-12-21
申请人： Donald John Rasmussen , Delbert Todd Mulholland
发明人： Donald John Rasmussen , Delbert Todd Mulholland
IPC分类号： H04B1/00
CPC分类号： H04L25/03834 , H04L27/2003 , H04L27/2014 , H04L27/2017
摘要： A method of pulse shaping a spread signal of serially formatted in-phase (I) and quadrature (Q) waveforms, where each waveform includes a predetermined number of chips per symbol, includes (a) examining adjacent chips of the I and Q waveforms at a symbol boundary; and (b) determining that one of the I or Q waveforms, includes two adjacent first and second chips separated by a single chip period, where the first chip belongs to a previous symbol and the second chip belongs to a present symbol. If the chips are of the same value, the method extends a peak value between the first and second chips, and zeros the other waveform of the I or Q waveform during the extended duration. If the chips are of opposite values, then the method zeroes one of the chips and inserts a chip into the other waveform.
摘要翻译：一种脉冲整形串行格式化的同相（I）和正交（Q）波形的扩展信号的方法，其中每个波形包括每个符号的预定数量的码片，包括（a）检查I和Q波形的相邻码片符号边界和（b）确定I或Q波形中的一个包括由单个码片周期隔开的两个相邻的第一和第二码片，其中第一码片属于先前符号，第二码片属于当前符号。如果芯片具有相同的值，则该方法在第一和第二芯片之间扩展峰值，并且在延长的持续时间内将I或Q波形的另一个波形加零。如果芯片具有相反的值，则该方法将芯片中的一个置零，并将芯片插入另一个波形。

2. 发明授权

US07609755B2 Simplified timing correction for data despreading of serial offset quadrature pulse-shaped spread signals 有权
标题翻译：用于串行偏移正交脉冲扩展信号的数据解扩的简化时序校正
公开(公告)号：US07609755B2
公开(公告)日：2009-10-27
申请号：US11313476
申请日：2005-12-21
申请人： Donald John Rasmussen
发明人： Donald John Rasmussen
IPC分类号： H04B1/00
CPC分类号： H04L27/22 , H04B1/7117 , H04B1/712 , H04L27/2003
摘要： A simplified timing correction method is provided for data despreading of serial offset quadrature pulse-shaped spread signals. The simplified timing correction algorithm is applied to a rake receiver for improved performance in a multi-path channel. Serial formatting of the spreading modulation waveform is selected to reduce the SYNC/serial probe correlation complexity. The method includes the steps of: (a) decimating serial inphase (I) and quadrature (Q) signals to form decimated I and Q even samples and decimated I and Q odd samples; (b) obtaining an autocorrelation profile of a spreading sequence used by the receiver; (c) detecting a synchronization starting point using the I and Q even samples; and (d) deciding to either move, or not move, the synchronization starting point, based on the autocorrelation profile obtained in step (b). Step (d) decides to move the synchronization starting point, and uses the I and Q odd samples for subsequent despreading of the I and Q signals. Step (d) also decides not to move the synchronization starting point, and uses the I and Q even samples for subsequent despreading of the I and Q signals.
摘要翻译：提供了一种用于串行偏移正交脉冲扩展信号的数据解扩的简化定时校正方法。将简化的时序校正算法应用于耙式接收机，以改善多路径信道的性能。选择扩展调制波形的串行格式化以减少SYNC /串行探针相关复杂度。该方法包括以下步骤：（a）抽取串行同相（I）和正交（Q）信号，以形成抽取的I和Q均匀采样和抽取的I和Q奇数样本; （b）获得由接收机使用的扩展序列的自相关分布; （c）使用I和Q均匀样本检测同步起始点; 以及（d）基于在步骤（b）中获得的自相关曲线，决定移动或不移动同步起始点。步骤（d）决定移动同步起始点，并使用I和Q奇数样本来进行I和Q信号的后续解扩。步骤（d）还决定不移动同步起始点，并且使用I和Q偶数采样来进行I和Q信号的后续解扩。

3. 发明授权

US07773696B1 QBL-MSK mapping for time of arrival (TOA) applications 有权
标题翻译：到达时间（TOA）应用程序的QBL-MSK映射
公开(公告)号：US07773696B1
公开(公告)日：2010-08-10
申请号：US11644144
申请日：2006-12-22
申请人： Donald John Rasmussen
发明人： Donald John Rasmussen
IPC分类号： H04L27/12
CPC分类号： H04L27/2014 , H04B1/7093 , H04B1/7095 , H04B2201/709709
摘要： A transmitter is configured to transmit a time of arrival (TOA) message to a receiver applying a quadrature multiple frequency ranging (QMFR) algorithm for separating multiple path signal components. The transmitter includes (1) a modulator for generating a quasi-band limited minimum shift keyed (QBL-MSK) signal, (2) a serial formatter for generating a serial QBL-MSK (SQBL-MSK) signal, and (3) a switch for disabling the serial formatter, during a time that the TOA message is being transmitted to the receiver. The receiver includes (1) a matched filter for separating a data packet with the TOA message into in-phase (I) and quadrature (Q) spreading sequences, (2) an even sample mapping section, coupled to the matched filter, for outputting the even samples of the I and Q spreading sequences, (3) an odd sample mapping section, coupled to the matched filter, for outputting the odd samples of the I and Q spreading sequences, and (4) sliding correlator banks for receiving the even samples of the I and Q spreading sequences and the odd samples of the I and Q spreading sequences and outputting despread even I and Q samples and despread odd I and Q samples to a QMFR algorithm for separating multiple path signal components.
摘要翻译：发射机被配置为向接收机发送到达时间（TOA）消息，所述接收机应用用于分离多路径信号分量的正交多频测距（QMFR）算法。发射机包括（1）用于产生准带限制最小移位键控（QBL-MSK）信号的调制器，（2）用于产生串行QBL-MSK（SQBL-MSK）信号的串行格式化器，以及（3）在TOA消息被发送到接收器的时间内禁止串行格式器的切换。接收机包括：（1）用于将具有TOA消息的数据分组分离成同相（I）和正交（Q）扩展序列的匹配滤波器，（2）耦合到匹配滤波器的偶数样本映射部分，用于输出 I和Q扩展序列的偶数样本，（3）耦合到匹配滤波器的奇数样本映射部分，用于输出I和Q扩展序列的奇数样本，以及（4）滑动相关器组用于接收偶数 I和Q扩展序列的样本和I和Q扩展序列的奇数样本，并输出解扩的偶数I和Q采样，并将奇数I和Q采样解扩展到用于分离多路径信号分量的QMFR算法。

4. 发明申请

US20090323867A1 Adaptive synchronization enhancement technique for serial modulated waveforms 有权
标题翻译：串行调制波形的自适应同步增强技术
公开(公告)号：US20090323867A1
公开(公告)日：2009-12-31
申请号：US11314757
申请日：2005-12-21
申请人： Donald John Rasmussen
发明人： Donald John Rasmussen
IPC分类号： H04L27/06
CPC分类号： H04L7/042
摘要： Methods and apparatus for synchronization (SYNC) detection of a received serial offset quadrature pulse shaped waveform modulated by a symbol SYNC sequence are provided. The waveform is serially demodulated into a serial baseband signal and correlated in parallel with segments of the symbol SYNC sequence. Correlation strength estimates of each of the correlated output signals are computed and used to adjust a SYNC threshold level. The correlation strength estimates or the correlated output signals are combined and a peak is determined in the resulting signal. The peak in the resulting signal is compared to the SYNC threshold level to detect synchronization.
摘要翻译：提供了由符号SYNC序列调制的接收的串行偏移正交脉冲波形的同步（SYNC）检测方法和装置。波形被串行解调为串行基带信号，并且与符号SYNC序列的段并行相关。计算每个相关输出信号的相关强度估计，并用于调整SYNC阈值水平。相关强度估计或相关输出信号被组合，并且在所得信号中确定峰值。将结果信号中的峰值与SYNC阈值电平进行比较，以检测同步。

5. 发明授权

US07630428B2 Fast digital carrier frequency error estimation algorithm using synchronization sequence 有权
标题翻译：快速数字载波频率误差估计算法采用同步序列
公开(公告)号：US07630428B2
公开(公告)日：2009-12-08
申请号：US11314122
申请日：2005-12-21
申请人： Donald John Rasmussen , Gregory Thomas Barnett
发明人： Donald John Rasmussen , Gregory Thomas Barnett
IPC分类号： H04B1/00
CPC分类号： H04L27/0014 , H04B1/70752 , H04L2027/003 , H04L2027/0048 , H04L2027/0067
摘要： Methods and apparatus for determining carrier frequency error of a serial offset quadrature pulse shaped signal, such as a minimum shift keyed (MSK) signal, are disclosed. Carrier frequency error is determined by receiving a quadrature pulse shaped signal having a synchronization sequence, detecting synchronization of the quadrature pulse shaped signal, and storing a baseband inphase (I) signal and a baseband quadrature (Q) signal of the synchronization sequence while detecting synchronization. After detecting synchronization, segments of the stored baseband I and Q signals are read and correlated with a spreading sequence. Carrier frequency error is then estimated based on phase differences between each of the correlated segments.
摘要翻译：公开了用于确定诸如最小移位键控（MSK）信号的串行偏移正交脉冲形状信号的载波频率误差的方法和装置。通过接收具有同步序列的正交脉冲形状信号，检测正交脉冲形状信号的同步以及存储同步序列的基带同相（I）信号和基带正交（Q）信号同时检测同步，确定载波频率误差。在检测到同步之后，存储的基带I和Q信号的段被读取并与扩展序列相关联。然后基于每个相关段之间的相位差来估计载波频率误差。

6. 发明申请

US20080101442A1 Simplified timing correction for data despreading of serial offset quadrature pulse-shaped spread signals 有权
标题翻译：用于串行偏移正交脉冲扩展信号的数据解扩的简化时序校正
公开(公告)号：US20080101442A1
公开(公告)日：2008-05-01
申请号：US11313476
申请日：2005-12-21
申请人： Donald John Rasmussen
发明人： Donald John Rasmussen
IPC分类号： H04B1/00
CPC分类号： H04L27/22 , H04B1/7117 , H04B1/712 , H04L27/2003
摘要： A simplified timing correction method is provided for data despreading of serial offset quadrature pulse-shaped spread signals. The simplified timing correction algorithm is applied to a rake receiver for improved performance in a multi-path channel. Serial formatting of the spreading modulation waveform is selected to reduce the SYNC/serial probe correlation complexity. The method includes the steps of: (a) decimating serial inphase (I) and quadrature (Q) signals to form decimated I and Q even samples and decimated I and Q odd samples; (b) obtaining an autocorrelation profile of a spreading sequence used by the receiver; (c) detecting a synchronization starting point using the I and Q even samples; and (d) deciding to either move, or not move, the synchronization starting point, based on the autocorrelation profile obtained in step (b). Step (d) decides to move the synchronization starting point, and uses the I and Q odd samples for subsequent despreading of the I and Q signals. Step (d) also decides not to move the synchronization starting point, and uses the I and Q even samples for subsequent despreading of the I and Q signals.
摘要翻译：提供了一种用于串行偏移正交脉冲扩展信号的数据解扩的简化定时校正方法。将简化的时序校正算法应用于耙式接收机，以改善多路径信道的性能。选择扩展调制波形的串行格式化以减少SYNC /串行探针相关复杂度。该方法包括以下步骤：（a）抽取串行同相（I）和正交（Q）信号，以形成抽取的I和Q均匀采样和抽取的I和Q奇数样本; （b）获得由接收机使用的扩展序列的自相关分布; （c）使用I和Q均匀样本检测同步起始点; 以及（d）基于在步骤（b）中获得的自相关曲线，决定移动或不移动同步起始点。步骤（d）决定移动同步起始点，并使用I和Q奇数样本来进行I和Q信号的后续解扩。步骤（d）还决定不移动同步起始点，并且使用I和Q偶数采样来进行I和Q信号的后续解扩。

7. 发明授权

US07801255B2 Synchronization technique for serial modulated waveforms 有权
标题翻译：串行调制波形同步技术
公开(公告)号：US07801255B2
公开(公告)日：2010-09-21
申请号：US11314608
申请日：2005-12-21
申请人： Donald John Rasmussen
发明人： Donald John Rasmussen
IPC分类号： H04L27/06
CPC分类号： H04L7/042 , H04B1/70752 , H04L27/2014 , H04L27/2278 , H04L2027/0065
摘要： Methods and apparatus for synchronization (SYNC) detection of a received serial offset quadrature pulse shaped waveform modulated by a symbol SYNC sequence are provided. The waveform is serially demodulated into a serial baseband signal and serially correlated with segments of the symbol SYNC sequence. Correlation strength estimates of each of the serially correlated output signal are computed and combined to detect a coarse SYNC. The serially correlated output signals are phase corrected based upon phase change conditions and the phase corrected signals are used to detect a fine SYNC.
摘要翻译：提供了由符号SYNC序列调制的接收的串行偏移正交脉冲波形的同步（SYNC）检测方法和装置。波形被串行解调为串行基带信号，并且与符号SYNC序列的片段串联相关。计算并组合每个串行相关输出信号的相关强度估计以检测粗SYNC。基于相变条件对串行相关的输出信号进行相位校正，并且使用相位校正信号来检测精细的SYNC。

8. 发明授权

US07715505B2 Adaptive synchronization enhancement technique for serial modulated waveforms 有权
标题翻译：串行调制波形的自适应同步增强技术
公开(公告)号：US07715505B2
公开(公告)日：2010-05-11
申请号：US11314757
申请日：2005-12-21
申请人： Donald John Rasmussen
发明人： Donald John Rasmussen
IPC分类号： H04L27/06
CPC分类号： H04L7/042
摘要： Methods and apparatus for synchronization (SYNC) detection of a received serial offset quadrature pulse shaped waveform modulated by a symbol SYNC sequence are provided. The waveform is serially demodulated into a serial baseband signal and correlated in parallel with segments of the symbol SYNC sequence. Correlation strength estimates of each of the correlated output signals are computed and used to adjust a SYNC threshold level. The correlation strength estimates or the correlated output signals are combined and a peak is determined in the resulting signal. The peak in the resulting signal is compared to the SYNC threshold level to detect synchronization.
摘要翻译：提供了由符号SYNC序列调制的接收的串行偏移正交脉冲波形的同步（SYNC）检测方法和装置。波形被串行解调为串行基带信号，并且与符号SYNC序列的段并行相关。计算每个相关输出信号的相关强度估计，并用于调整SYNC阈值水平。相关强度估计或相关输出信号被组合，并且在所得信号中确定峰值。将结果信号中的峰值与SYNC阈值电平进行比较，以检测同步。

9. 发明授权

US07593454B2 Enhanced QPSK or DQPSK data demodulation for direct sequence spreading (DSS) system waveforms using orthogonal or near-orthogonal spreading sequences 有权
标题翻译：使用正交或近正交扩展序列的直接序列扩展（DSS）系统波形的增强型QPSK或DQPSK数据解调
公开(公告)号：US07593454B2
公开(公告)日：2009-09-22
申请号：US11314123
申请日：2005-12-21
申请人： Donald John Rasmussen
发明人： Donald John Rasmussen
IPC分类号： H04B1/00 , H04L7/00
CPC分类号： H04B1/7085 , H04L27/2275
摘要： A method of correcting phase error of a phase shift keyed (PSK) signal includes (a) receiving a signal modulated by a spreading sequence; (b) despreading the received signal using a receiver spreading sequence similar to the spreading sequence of step (a); (c) calculating a crosscorrelation profile between the receiver spreading sequence and the received signal; and (d) calculating an autocorrelation profile of the receiver spreading sequence to determine a spreading code property (SCP). The method also includes (e) estimating a timing error in alignment between the autocorrelation and the crosscorrelation profiles; and (f) correcting a phase error of the signal despread in step (c), by using the SCP and the estimated timing error.
摘要翻译：校正相移键控（PSK）信号的相位误差的方法包括：（a）接收由扩展序列调制的信号; （b）使用类似于步骤（a）的扩展序列的接收机扩展序列解扩接收信号; （c）计算接收机扩展序列与接收信号之间的互相关分布; 和（d）计算接收机扩展序列的自相关分布以确定扩展码属性（SCP）。该方法还包括（e）估计自相关和互相关分布之间的对准的定时误差; 以及（f）通过使用SCP和估计的定时误差来校正在步骤（c）中解扩的信号的相位误差。

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